質問
I have a network of sites which comminicate to eachother all sorts of events and functionality.
Having a combined analytics system, I realized the need for a central clock, to put them all, perfectly, on the same schedule down to the millisecond.
Right now I'm using a typical timestamp format:
https://stackoverflow.com/questions/21466236
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Russian<?php date('Y-m-d H:i:s') ?>
This is different for all servers, of course. I was hoping to achieve a way to get that very same 'Y-m-d H:i:s' from an online, central clock or service.
Does such a thing exist? It should be as reliable as getting jquery from google.
Its with pain that I write this, I simply cannot stop myself from compulsively asking this knowing it will get a downvote! But it is a serious issue and good question!
解決
You can sync with NTP. NTP is a central clock, where various computers can get their time from.
So, you can either set all your machines to get their time from a single NTP server, or just use a PHP NTP client to pull the time from a central clock. Your call. Check out an example here: http://xlo.co/blog/general/php-ntp-client
Is this what you are looking to do?
他のヒント
You have to query a time server for that. These servers/communication use the Network Time Protocol to give a unified time across global network of computers.
Check http://www.ntp.org/
As far as querying these servers are concerned, it is a normal fsockopen
Maybe this SO answer will help you as well
